His voice dripping with exasperation, the White House press secretary, Robert Gibbs, said to me one July afternoon in his office: “If I would have told you that I could open up a Facebook account or a Twitter account, simply post quotes, and have the White House asked about those, and to have the entire White House press corps focused on your quote of the day on Facebook – that’s Sarah Palin. She tweets one thing, and all of a sudden you’ve got a room full of people that want to know. . . .”

Gibbs shook his head and continued: “Now, I could say, ‘You know what? I’m not going to deal with that.’ And big headline: Palin Accuses Obama of X. The White House Had No Comment.”

“I just tweet; that’s just the way I roll,” Palin told me. “Just expressing my feelings via Twitter and Facebook. I choose them because they’re convenient for me, especially from Wasilla.” She continued: “The only thing I do consider is when I think of what’s going on in the East Coast, with the difference in time zones. I can tweet before going to bed at midnight or 1 and know that they’re up and at ’em, and they’re going to have to respond.” In this compressed, no-nuance cyberzone, Palin can land a hard punch without ever setting foot in the ring – calling the then-White House chief of staff Rahm Emanuel “as shallow/narrowminded/political/irresponsible as they come” and saying the Politico writer Jonathan Martin is “full of crap.” In July, Palin’s BlackBerry spewed out a much-publicized volley of tweets calling on peaceful Muslims to “refudiate” the “ground zero mosque” and in the process suckering Obama into taking a position for which he was attacked by all sides. Palin wrote these without consulting anyone, her lawyer Thomas Van Flein told me: “I found out like everyone else did. This is her political instinct in action.”

Palin has more quickly grasped the new media environment and its massive impact on politics than any other major political figure, and she runs rings aroudn the slow, insecure and increasingly desperate-looking president and his hapless media spokesman.